Commit 8bc618d6 authored by Herbert Xu's avatar Herbert Xu

crypto: doc - Use ahash

This patch replaces the crypto_hash example in api-intro.txt with
crypto_ahash.
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 0660511c
......@@ -49,28 +49,33 @@ under development.
Here's an example of how to use the API:
#include <linux/crypto.h>
#include <crypto/ahash.h>
#include <linux/err.h>
#include <linux/scatterlist.h>
struct scatterlist sg[2];
char result[128];
struct crypto_hash *tfm;
struct hash_desc desc;
struct crypto_ahash *tfm;
struct ahash_request *req;
tfm = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC);
tfm = crypto_alloc_ahash("md5", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm))
fail();
/* ... set up the scatterlists ... */
desc.tfm = tfm;
desc.flags = 0;
if (crypto_hash_digest(&desc, sg, 2, result))
req = ahash_request_alloc(tfm, GFP_ATOMIC);
if (!req)
fail();
ahash_request_set_callback(req, 0, NULL, NULL);
ahash_request_set_crypt(req, sg, result, 2);
crypto_free_hash(tfm);
if (crypto_ahash_digest(req))
fail();
ahash_request_free(req);
crypto_free_ahash(tfm);
Many real examples are available in the regression test module (tcrypt.c).
......
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